.flex_row{
    display: flex;
    justify-content: center;
    align-items: center;
  }
  .flex_column{
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  .flex_wrap{
    display: flex;
    flex-wrap: wrap;
  }
  .flex_start{
    display: flex;
    justify-content: flex-start;
    align-items: center;
  }
  .flex_end{
    display: flex;
    justify-content: flex-end;
    align-items: center;
  }
  .flex_between{
    display: flex;
    justify-content:space-between;
    align-items: center;
  }
  
  .flex_around {
    display: flex;
    justify-content: space-around;
    align-items: center;
  }
  
  .width_100{
    width: 100%;
  }
  .height_100{
    height: 100%;
  }